Helmet grommet



FIG. 1 is an isometric view of a helmet grommet, according to an exemplary embodiment of the invention;

FIG. 2 is another isometric view of a helmet grommet, according to an exemplary embodiment of the invention; and,

FIG. 3 is a planar view of a helmet grommet, according to an exemplary embodiment of the invention. 

CLAIM I claim the ornamental design for a helmet grommet, as shown and described. 